Process for sewing continuous W-shaped three-dimensional knitted lining cloth of down jacket

Abstract

The invention relates to the field of down jacket sewing processes, in particular to a down jacket continuous W-shaped three-dimensional woven lining cloth sewing process which is used for sewing lining cloth comprising first fabric, second fabric and third fabric, the first fabric and fabric C are located on the two sides of fabric B, and the second fabric is located on the two sides of fabric C; the sewing process comprises the following steps: step A, sewing the edges of a first fabric and a second fabric through a first sewing line; b, the second fabric and the third fabric are sewn at the preset position away from the first sewing line through a second sewing line, and the first sewing line is parallel to the second sewing line; c, the first fabric and the second fabric as well as the second fabric and the third fabric are alternately sewn, so that the first sewing threads and the second sewing threads are alternately distributed; the woven liner cloth can effectively separate down feathers, so that the down feathers are uniformly distributed in each independent space, the stability of the warm keeping performance is greatly improved, and the cold spot phenomenon is eliminated.

Description

Technical Field

[0001] This invention relates to the field of down jacket sewing technology, and more particularly to a sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets. Background Technology

[0002] Traditional down jacket lining fabric manufacturing processes have numerous defects, severely impacting the warmth and overall quality of down jackets. Conventional lining fabric production often employs a two-dimensional planar structure, which easily leads to uneven distribution of down filling, resulting in poor warmth retention and cold spots. Furthermore, the stitching method of planar lining fabrics is prone to tearing at the seams during long-term wear and washing, causing down to escape and reducing the durability of the down jacket. Therefore, this application proposes a continuous W-shaped three-dimensional knitted lining fabric sewing process for down jackets. Summary of the Invention

[0003] The purpose of this invention is to provide a continuous W-shaped three-dimensional knitted lining sewing process for down jackets, in order to solve the problem of uneven distribution of down feathers inside down jackets.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A sewing process for a continuous W-shaped three-dimensional woven lining fabric for down jackets, used to sew a lining fabric comprising a first fabric, a second fabric, and a third fabric, wherein the first fabric and fabric C are located on both sides of fabric B, and the sewing process includes: Step A: Sew the edges of the first fabric and the second fabric together using the first seam line; Step B: Sew the second fabric and the third fabric together at a predetermined position from the first suture line using the second suture line, wherein the first suture line and the second suture line are parallel; Step C: Alternately sew the first fabric and the second fabric, and the second fabric and the third fabric, so that the first suture line and the second suture line are alternately distributed.

[0005] Furthermore, the first fabric, the second fabric, or the third fabric uses a high-strength, high-toughness fiber surface.

[0006] Furthermore, the first fabric or the third fabric is a high-density downproof fabric, and the second fabric is a breathable fabric.

[0007] Furthermore, the first suture and the second suture are straight lines, and the first suture and the second suture are parallel.

[0008] Preferably, steps A to C are performed by a sewing device, which includes: The frame is provided with at least three parallel feed roller groups and at least one discharge roller group. The three feed roller groups are arranged in three directions of the discharge roller group. The frame is also provided with a set of steering rods, which are arranged inside the polygon formed by the feed roller groups and the discharge roller groups. Both the feed roller groups and the discharge roller groups are powered roller groups. The first fabric, the second fabric, and the third fabric pass through the three feed roller groups respectively and merge at the steering rod group. The merged first fabric, second fabric, and third fabric then pass through the discharge roller group. The rotary shuttle is mounted on the frame via a first linear displacement mechanism. The first linear displacement mechanism is used to drive the rotary shuttle to slide along the length direction of the steering rod assembly. The rotary shuttle is equipped with a rotary shuttle mechanism with independent power to drive its rotation. The rotary shuttle is located on the side of the first fabric and the third fabric away from the second fabric. The needle feed head is mounted on the frame via a second linear displacement mechanism. The second linear displacement mechanism drives the needle feed head to slide along the length of the steering rod assembly. The needle feed head is equipped with a needle mechanism that is driven up and down by an independent power source. The needle feed head is located between the first fabric and the second fabric, and between the second fabric and the third fabric. The rotary hook and the needle feed head cooperate with each other to sew the first fabric, the second fabric, and the third fabric.

[0009] Furthermore, the needle feed head is fixedly connected to the output shaft of the first linear displacement mechanism via a telescopic mechanism.

[0010] Furthermore, the steering rod assembly consists of two smooth steel wires, the two ends of which are fastened to the frame, and the two smooth steel wires are arranged parallel and tangentially.

[0011] Furthermore, the needle feeder head is also equipped with a tangent structure.

[0012] Furthermore, the sewing device also includes: The pressure bar assembly consists of two smooth round bars, which are distributed on both sides of the second fabric and clamp the second fabric. The pressure bar moving mechanism is used to drive the pressure bar assembly to move or swing, thereby pressing the second fabric onto the first fabric or the third fabric.

[0013] In summary, the present invention has the following advantages compared with the prior art: The continuous W-shaped three-dimensional knitted lining sewing process for down jackets disclosed in this invention connects the second fabric to the first fabric and the third fabric in sequence, so that the second fabric forms a continuous "W" shaped structure. The structure can effectively separate the down, making it evenly distributed in each independent space, which greatly improves the stability of the warmth retention performance and eliminates the cold spot phenomenon. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the lining fabric used in the continuous W-shaped three-dimensional knitting lining fabric sewing process of down jackets according to the present invention.

[0015] Figure 2 This is a schematic diagram of the process for sewing the continuous W-shaped three-dimensional woven lining fabric for down jackets, as disclosed in Embodiment 1 of the present invention.

[0016] Figure 3 This is a schematic diagram of the sewing device used in the continuous W-shaped three-dimensional knitted lining sewing process of down jackets, as disclosed in Embodiment 2 of the present invention.

[0017] Figure 4 for Figure 3 A magnified view of a section at point I.

[0018] Figure label: 10. First fabric; 20. Second fabric; 30. Third fabric; 40. First seam thread; 50. Second seam thread; 100. Frame; 101. Feed roller assembly; 102. Discharge roller assembly; 103. Steering rod assembly; 104. Reversing rod assembly; 105. Pressure rod; 200. Hook assembly; 300. Needle feed head; 400. First linear displacement mechanism; 500. Telescopic mechanism; 600. Second linear displacement mechanism. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example 1 Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a sewing process for a continuous W-shaped three-dimensional knitted lining fabric for down jackets, used to sew a lining fabric comprising a first fabric 10, a second fabric 20, and a third fabric 30, wherein the first fabric 10 and fabric C are located on both sides of the fabric B, and the sewing process includes: Step A: Sew the edges of the first fabric 10 and the second fabric 20 together through the first seam 40; Step B: Sew the second fabric 20 and the third fabric 30 together at a predetermined position at a distance of 40 from the first suture line through the second suture line 50, wherein the first suture line 40 and the second suture line 50 are parallel. Step C: Alternately sew the first fabric 10 and the second fabric 20, the second fabric 20 and the third fabric 30, so that the first suture line 40 and the second suture line 50 are alternately distributed.

[0021] In this embodiment, when sewing the lining fabric using the sewing process described herein, a first fabric 10, a second fabric 20, and a third fabric 30 are prepared. The edges of the first fabric 10, the second fabric 20, and the third fabric 30 are aligned. During sewing, sewing begins from one end. First, the first fabric 10 and the second fabric 20 are sewn together using a first seam 40 to fix their edges. Then, the second fabric 20 and the third fabric 30 are sewn together using a second seam 50. Finally, the third fabric 30 is sewn together using a second seam 50. A seam 40 is used to sew the first fabric 10 and the second fabric 20 together. The first fabric 10 and the second fabric 20, the second fabric 20 and the third fabric 30 are sewn together in sequence as described above, until the first fabric 10, the second fabric 20 and the third fabric 30 are completely sewn together. The second fabric 20 is located between the first fabric 10 and the third fabric 30. The first seam 40 and the second seam 50 are parallel and are sewn alternately, so that the second fabric 20 forms a continuous "W" shaped structure.

[0022] This embodiment uses a special three-dimensional weaving technique to construct a continuous "W" shaped structure. This structure can effectively separate the down feathers, making them evenly distributed in each independent space, which greatly improves the stability of the warmth retention performance and eliminates the cold spot phenomenon.

[0023] The continuous W-shaped three-dimensional knitted lining sewing process for down jackets disclosed in this embodiment of the invention connects the second fabric 20 to the first fabric 10 and the third fabric 30 in sequence, so that the second fabric 20 forms a continuous "W" shaped structure. The structure can effectively separate the down and distribute it evenly in each independent space, which greatly improves the stability of the warmth retention performance and eliminates the cold spot phenomenon.

[0024] As a preferred embodiment of this example, the first fabric 10, the second fabric 20, or the third fabric 30 are made of high-strength, high-toughness fiber fabrics, such as UHMWPE blended fabrics, aramid fabrics, polyester fiber fabrics, etc., which greatly improves the strength of the lining itself. Even after frequent wear and washing, it can effectively prevent the seams from breaking, reduce the risk of down feathers coming out, and significantly extend the service life of the down jacket.

[0025] In a preferred embodiment of this invention, the first suture 40 and the second suture 50 are straight lines, and the first suture 40 and the second suture 50 are parallel.

[0026] In this embodiment, the first suture 40 and the second suture 50 may also be curves, such as continuous "W" shaped lines.

[0027] In a preferred embodiment of this invention, when the first fabric 10 or the third fabric 30 is the outer layer of a down jacket, the first fabric 10 or the third fabric 30 is a high-density downproof fabric, and the second fabric 20 is a breathable fabric.

[0028] To verify the performance of the lining fabric using the sewing process disclosed in this embodiment, down jackets were sewn using fabrics of the same size according to both conventional and the method of this application. The performance of the down jackets was then tested, and the test results are shown in Table 1. Table 1 As shown in Table 1, the down jacket using the "W" shaped structure of this application has a down filament displacement rate reduced by 82%, and the uniformity of down filling, low-temperature resilience, and loft after washing are improved by 141.5%, 130%, and 118.3%, respectively, which are all superior to traditional down jacket sewing processes.

[0029] Example 2 As another embodiment of the present invention, this embodiment also discloses that the sewing process employs a sewing device, such as... Figure 3 and Figure 4 As shown, the sewing device includes: A frame 100 is provided with at least three parallel feed roller groups 101 and at least one discharge roller group 102. The three feed roller groups 101 are arranged in three directions of the discharge roller group 102. A set of steering rods 103 is also provided on the frame 100. The steering rods 103 are arranged inside the polygon formed by the feed roller groups 101 and the discharge roller groups 102. Both the feed roller groups 101 and the discharge roller groups 102 are powered roller groups. The first fabric 10, the second fabric 20 and the third fabric 30 pass through the three feed roller groups 101 respectively and merge at the steering rods 103. The merged first fabric 10, second fabric 20 and third fabric 30 pass through the discharge roller group 102. A rotary shuttle 200 is mounted on the frame 100 via a first linear displacement mechanism 400. The first linear displacement mechanism 400 is used to drive the rotary shuttle 200 to slide along the length direction of the steering rod assembly 103. The rotary shuttle 200 is provided with a rotary shuttle mechanism with independent power to drive its rotation. The rotary shuttle 200 is located on the side of the first fabric 10 and the third fabric 30 away from the second fabric 20. A needle feed head 300 is mounted on the frame 100 via a second linear displacement mechanism 600. The second linear displacement mechanism 600 drives the needle feed head 300 to slide along the length direction of the steering rod assembly 103. The needle feed head 300 is equipped with a needle mechanism that is independently powered by the frame 100 to move up and down. The needle feed head 300 is located between the first fabric 10 and the second fabric 20, and between the second fabric 20 and the third fabric 30. The rotary hook 200 and the needle feed head 300 cooperate with each other to sew the first fabric 10, the second fabric 20, and the third fabric 30. Specifically, in this embodiment, such as Figure 3As shown, the second fabric 20 is vertically arranged. The feed roller assembly 101 has three sets, respectively used to clamp the first fabric 10, the second fabric 20, and the third fabric 30. The portion of the first fabric 10 located between the feed roller assembly 101 and the steering rod assembly 103 is inclined. The portion of the third fabric 30 located between the feed roller assembly 101 and the steering rod assembly 103 is mirror-image of the first fabric 10. The second fabric 20 is located between the first fabric 10 and the third fabric 30. The needle feed head 300 is fixedly connected to the output shaft of the first linear displacement mechanism 400 via a telescopic mechanism 500. Both the feed roller assembly 101 and the discharge roller assembly 102 are equipped with two roller structures, and the steering rod assembly 103 is equipped with two smooth round rod structures. The feed roller assembly 101 clamps the first fabric 10, the second fabric 20, and the third fabric 30, and the discharge roller assembly 102 clamps the sewn lining fabric. The feed roller assembly 101 and the discharge roller assembly 102 work together to control the movement of the first fabric 10, the second fabric 20, and the third fabric 30. When sewing the first fabric 10 and the second fabric 20, the needle feed head 300 located between the second fabric 20 and the third fabric 30... Under the control of the telescopic mechanism 500, the needle feed head 300 presses the second fabric 20 onto the first fabric 10. The first linear displacement mechanism 400 drives the corresponding rotary hook 200 and the needle feed head 300 to move laterally along the first fabric 10. During the movement, the rotary hook 200 and the needle feed head 300 sew the first fabric 10 and the second fabric 20. When sewing the second fabric 20 and the third fabric 30, the telescopic mechanism 500 located between the first fabric 10 and the second fabric 20 extends, and the needle feed head 300 located between the first fabric 10 and the second fabric 20... The first linear displacement mechanism 400 located between the first fabric 10 and the second fabric 20 and the first linear displacement mechanism 400 located on the side of the third fabric 30 away from the second fabric 20 move, controlling the movement of the corresponding rotary hook 200 and the needle feed head 300, for sewing the second fabric 20 and the third fabric 30; then the first fabric 10 and the second fabric 20 are sewn again, and the first fabric 10 and the second fabric 20 and the second fabric 20 and the third fabric 30 are sewn in sequence in the above manner.

[0030] It should be noted that the rotary hook 200 and the needle feed head 300 move synchronously under the control of the corresponding first linear displacement mechanism 400, thereby completing the sewing of the first fabric 10, the second fabric 20 and the third fabric 30. At the same time, after the sewing of one stitch is completed, the feed roller group 101 and the output roller group 102 rotate at a preset angle, thereby controlling the first fabric 10, the second fabric 20 and the third fabric 30 to move a preset distance, so that there is a preset distance between different stitches.

[0031] The frame 100 is existing technology. For example, the frame 100 is composed of two parallel support plates. The feed roller group 101 and the discharge roller group 102 are each provided with two tangent roller structures. The feed roller group 101 and the discharge roller group 102 are both driven by a power motor to rotate. When controlling the movement of the first fabric 10, the second fabric 20 and the third fabric 30, the feed roller group 101 and the discharge roller group 102 rotate synchronously, and at the same time control the synchronous movement of the first fabric 10, the second fabric 20, the third fabric 30 and the sewn fabric.

[0032] In this embodiment, three sets of feed roller groups 101 are provided, and one set of discharge roller groups 102 is provided. The three sets of feed roller groups 101 respectively clamp the first fabric 10, the second fabric 20, and the third fabric 30. The two ends of the feed roller groups 101 and the discharge roller groups 102 are respectively mounted on different support plates. The roller structures in the feed roller groups 101 and the discharge roller groups 102 are rotatably connected to the frame 100. The power mechanisms in the feed roller groups 101 and the discharge roller groups 102 are fixedly connected to the frame 100.

[0033] The steering rod assembly 103 consists of two smooth steel wires, both ends of which are fastened to a support plate with screws. The two smooth steel wires are parallel and tangential. The steering rod assembly 103 is located between the feed roller assembly 101 and the discharge roller assembly 102. In this embodiment, the feed roller assembly 101 in the middle is collinear with the steering rod assembly 103 and the discharge roller assembly 102, while the feed roller assemblies 101 on both sides are distributed to the upper left and upper right of the steering rod assembly 103. Figure 3Taking the direction as an example, the first fabric 10, the second fabric 20, and the third fabric 30 are tensioned between the feed roller group 101, the discharge roller group 102, and the third fabric 30. When the needle feed head 300 presses the second fabric 20, the discharge roller group 102 that clamps the second fabric 20 rotates synchronously a preset number of times, thereby relaxing the second fabric 20, so that the needle feed head 300 presses the second fabric 20.

[0034] The rotary hook 200 is existing technology, such as the part located below the worktable in an existing sewing machine. It has a rotary hook mechanism inside, and a ball of thread is installed inside the rotary hook mechanism. When the rotary hook mechanism rotates, it can hook the loop passing through the fabric and control the loop to rotate around the rotary hook mechanism once, so that the thread inside the rotary hook mechanism passes through the loop, thereby hooking the loop and completing the sewing process. The rotary hook mechanism is controlled by a separate stepper motor to rotate.

[0035] The needle feed head 300 is existing technology, such as the part located above the worktable in existing sewing machines. It has a telescopic needle inside. The thread on the needle feed head 300 passes through the needle hole on the needle and forms a loop at the hook and loop structure as the needle passes through the fabric. The needle is driven to extend and retract by a four-bar telescopic structure, which is driven to rotate by a separate stepper motor. The rotation speed of the stepper motors located in the rotary hook section 200 and the needle feed head 300 conforms to a preset rule, that is, the extension and retraction frequency of the needle and the rotation speed of the rotary hook mechanism are the same as the corresponding structure in existing sewing machines.

[0036] In a preferred embodiment of this invention, the needle feed head 300 is further provided with a thread-cutting structure. This thread-cutting structure is existing technology, such as the thread-cutting structure of a sewing machine in the prior art. It mainly includes components such as a mounting plate, a cutter, a transmission assembly, a rotating gear, a connecting rod, a gear rod, and a hydraulic cylinder. Specifically, the thread-cutting assembly is mounted on the mounting plate, a handle is fixedly connected to the front side of the transmission assembly, a rotating gear is fixedly connected to the outer side of the transmission assembly, a gear rod is fixedly connected to the bottom of the connecting rod, a hydraulic cylinder is fixedly connected to the bottom of the gear rod, a fixed seat is fixedly connected to the output shaft of the hydraulic cylinder, a connecting plate is fixedly connected to the left side of the fixed seat, and a camera device is fixedly connected to the bottom of the connecting plate. This design of the thread-cutting structure allows the cutting position to be adjusted by rotating the shaft to move the gear back and forth during sewing.

[0037] In this embodiment, the first linear displacement mechanism 400 is prior art. For example, in this embodiment, the first linear displacement mechanism 400 is a synchronous belt linear movement structure, such as including a synchronous belt structure and a guide rail structure. The guide rail structure is fixedly connected to the frame 100. The slider on the guide rail structure is fixedly connected to the rotary hook 200 and the needle feed head 300. The slider is fixed to the synchronous belt. When the synchronous belt rotates, it drives the slider to move along the guide rail, thereby driving the rotary hook 200 and the needle feed head 300 to move in a straight line. In this embodiment, the first linear displacement mechanism 400 can also be a lead screw linear displacement mechanism. The first linear displacement mechanism 400 is fixed to the frame 100.

[0038] In a preferred embodiment of this invention, the rotary hook 200 is further fixedly connected to a telescopic mechanism 500. The output shaft of the telescopic mechanism 500 is fixedly connected to the rotary hook 200. The telescopic mechanism 500 is fixedly connected to the output end of the first linear displacement mechanism 400. The telescopic mechanism 500 is a pneumatic or electric telescopic structure. When the output shaft of the telescopic mechanism 500 connected to the rotary hook 200 is extended, the rotary hook 200 abuts against the first fabric 10 or the third fabric 30.

[0039] like Figure 4 As shown, a pressure plate 105 is provided on the side of the first fabric 10 and the third fabric 30 away from the first fabric 10. The pressure plate 105 is used to support the first fabric 10 or the third fabric 30. The pressure plate 105 is a smooth steel plate and has avoidance holes for avoiding the stitching.

[0040] In a preferred embodiment of this invention, the sewing device further includes: The pressure bar assembly 104 consists of two smooth round bars, which are distributed on both sides of the second fabric 20 and clamp the second fabric 20. The pressure bar moving mechanism is used to drive the pressure bar assembly 104 to move or swing, thereby pressing the second fabric 20 onto the first fabric 10 or the third fabric 30. Specifically, when sewing the first fabric 10 and the second fabric 20, or the second fabric 20 and the third fabric 30, the second fabric 20 is pressed onto the first fabric 10 or the third fabric 30 by controlling the pressure bar assembly 104. For example, when sewing the first fabric 10 and the second fabric 20, the second fabric 20 is pressed onto the first fabric 10 by the pressure bar assembly 104, and when sewing the second fabric 20 and the third fabric 30, the second fabric 20 is pressed onto the third fabric 30 by the pressure bar assembly 104.

[0041] The pressure rod moving mechanism is a swing structure (such as a crank rocker mechanism) or a linear displacement structure (such as a lead screw, telescopic cylinder, etc.). When the pressure rod moving mechanism is a linear displacement structure, the first fabric 10 and the third fabric 30 are inclined.

[0042] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The singular forms "a," "the," and "the" used in this invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0043] It should be understood that although the terms "first," "second," "third," etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. Depending on the context, the term "if" as used herein may be interpreted as "when," "when," or "in response to determining."

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets, characterized in that, For sewing a lining fabric comprising a first fabric, a second fabric, and a third fabric, wherein the first fabric and fabric C are located on both sides of fabric B, the sewing process includes: Step A: Sew the edges of the first fabric and the second fabric together using the first seam line; Step B: Sew the second fabric and the third fabric together at a predetermined position from the first suture line using the second suture line, wherein the first suture line and the second suture line are parallel; Step C: Alternately sew the first fabric and the second fabric, and the second fabric and the third fabric, so that the first suture line and the second suture line are alternately distributed.

2. The sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets according to claim 1, characterized in that, The first fabric, the second fabric, or the third fabric uses high-strength, high-toughness fiber surfaces.

3. The sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets according to claim 1, characterized in that, The first fabric or the third fabric is a high-density downproof fabric, and the second fabric is a breathable fabric.

4. The sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets according to claim 1, characterized in that, The first suture and the second suture are straight lines, and the first suture and the second suture are parallel.

5. The sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets according to any one of claims 1-4, characterized in that, Steps A to C are performed by a sewing device, which includes: The frame is provided with at least three parallel feed roller groups and at least one discharge roller group. The three feed roller groups are arranged in three directions of the discharge roller group. The frame is also provided with a set of steering rods, which are arranged inside the polygon formed by the feed roller groups and the discharge roller groups. Both the feed roller groups and the discharge roller groups are powered roller groups. The first fabric, the second fabric, and the third fabric pass through the three feed roller groups respectively and merge at the steering rod group. The merged first fabric, second fabric, and third fabric then pass through the discharge roller group. The rotary shuttle is mounted on the frame via a first linear displacement mechanism. The first linear displacement mechanism is used to drive the rotary shuttle to slide along the length direction of the steering rod assembly. The rotary shuttle is equipped with a rotary shuttle mechanism with independent power to drive its rotation. The rotary shuttle is located on the side of the first fabric and the third fabric away from the second fabric. The needle feed head is mounted on the frame via a second linear displacement mechanism. The second linear displacement mechanism drives the needle feed head to slide along the length of the steering rod assembly. The needle feed head is equipped with a needle mechanism that is driven up and down by an independent power source. The needle feed head is located between the first fabric and the second fabric, and between the second fabric and the third fabric. The rotary hook and the needle feed head cooperate with each other to sew the first fabric, the second fabric, and the third fabric.

6. The sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets according to claim 5, characterized in that, The needle feed head is fixedly connected to the output shaft of the first linear displacement mechanism via a telescopic mechanism.

7. The sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets according to claim 5, characterized in that, The steering rod assembly consists of two smooth steel wires, the two ends of which are fastened to the frame. The two smooth steel wires are arranged parallel and tangentially.

8. The sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets according to claim 5, characterized in that, The needle feed head is also equipped with a tangent structure.

9. The sewing process for continuous W-shaped three-dimensional woven lining fabric in down jackets according to claim 5, characterized in that, The sewing device further includes: The pressure bar assembly consists of two smooth round rods, which are distributed on both sides of the second fabric and clamp the second fabric. The pressure bar moving mechanism is used to drive the pressure bar assembly to move or swing, thereby pressing the second fabric onto the first fabric or the third fabric.

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